/Engine/Source/Runtime/AudioMixer/Public/Quartz/AudioMixerClockManager.h
Add a new command to a given clock safe to call from AudioThread (uses Audio Render Thread command)
[FQuartzQuantizedCommandHandle](API\Runtime\Engine\Sound\FQuartzQuantizedCommandHandle) AddCommandToClock ( [FQuartzQuantizedCommandInitInfo](API\Runtime\Engine\Sound\FQuartzQuantizedCommandInitInfo) & InQuantizationCommandInitInfo )